package com.zy.hospitalward_management_system.config;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

//一个拦截器
public class LoginHandlerInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        System.out.println("test=>>>拦截器正在处理"+request.getRequestURI());

        //登陆成功之后,应该有用户的Session;
        Object loginUser = request.getSession().getAttribute("loginUser");
        if(loginUser==null){//没有登录
            request.setAttribute("msg", "没有权限,请先登录");
            request.getRequestDispatcher("/").forward(request, response);
            System.out.println("test=>>>拦截器未通过:"+request.getRequestURI());
            return false;
        }else {
            System.out.println("test=>>>拦截器通过:"+request.getRequestURI());
            return true;
        }




    }


}
